The Cavalla replaces the Metaloid series. The 5 and 12 two speeds are now in stock, N (narrow) models will be arriving shortly. The new pieces are a little more refined, range of drag increased - not as fast an increase in pressure, feels smoother, longer handle on the 5's - same as 12's. Price increased a tad, helical cut gears not being used this time around. Will provide more info on our site over the next day or two.